The Geology of Jezero Crater, Observations & Findings |
The Geology of Jezero Crater, Observations & Findings |
Feb 24 2021, 01:41 AM
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#16
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Merciless Robot Group: Admin Posts: 8784 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
This thread is for those rockhounds among us to discuss the new terrain we'll see as Perseverance scoots around her new home. Let's get dirty & technical!
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Feb 27 2021, 05:38 PM
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#17
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Member Group: Members Posts: 311 Joined: 31-August 05 From: Florida & Texas, USA Member No.: 482 |
This image was cropped from the mastcam-z pan. It appears the wind scouring of the "holey rocks" at the base of the rover show a prevailing direction occurred for a long period of time. If aeolian deflation of the delta occurred, then the sediments likely were deposited in that direction. If the hardness of the holey rocks and delta deposits can be assessed, then the total mass lost to erosion would have an estimate. I also wonder if the wind helped scour some of those holes larger? |
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Feb 27 2021, 08:58 PM
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#18
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Member Group: Members Posts: 684 Joined: 24-July 15 Member No.: 7619 |
This image was cropped from the navcam pan. It appears the wind scouring of the "holey rocks" at the base of the rover show a prevailing direction occurred for a long period of time. If aeolian deflation of the delta occurred, then the sediments likely were deposited in that direction. Very interesting- those grooves look VERY much like what you find in glacial till - rocks that were held in place by soil as ice was flowing over them, or small pieces of rock that were held in place by ice which flowed over other rocks. It should be fairly easy to determine, as the orientation of the grooves should quickly reveal if weather or wether is responsible. If the hardness of the holey rocks and delta deposits can be assessed, then the total mass lost to erosion would have an estimate. I also wonder if the wind helped scour some of those holes larger? The voids/vugs are fairly small, for aeolian 'pot holes" but most DO seem to have the signature of water-worn potholes, a single abrasive rock in each chamber. If should be easier to know what is happening after a few more rocks are imaged.
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